A US woman who shot and killed her husband and two adult children before taking her own life is thought to have committed the shocking crime as a result of being ostracised from the religion she was raised in.

Every time I tell a mate I’m doing a story on cryptocurrency, they invariably ask me the same two questions: should they invest their own hard-earned money, and which cryptocurrency will get them a Lamborghini/yacht/island quickest?

Berejiklian sworn in as NSW's 45th Premier

Gladys Berejiklian has been officially sworn in as NSW's 45th Premier.

Ms Berejiklian, 46, took the oath of allegiance at a ceremony at Government House in Sydney on Monday afternoon shortly after her predecessor Mike Baird formally tendered his resignation.

The outgoing treasurer's Armenian immigrant parents, Krikor and Arsha, and her two sisters had front-row seats at the ceremony which took place after Ms Berejiklian was elected unopposed as NSW Liberal Party leader earlier in the day.